Method of making containers



E. F. HULBERT METHOD OF MAKING CONTAINERS June 29 1926.

Filed Dec. 25, 1925 f @M F A TTORNEYJ Patented June 29, 1926.- 4

UNITED STATES PATENT OFFICE.

EDWIN I. HULBERT, 01 MILWAUKEE, WISCONSIN, ASSIGNOB TO THE MASTER PACK-AGE CORPORATION; OF OWEN, WISCONSIN, A CORPORATION OF DELAWARE.

METHOD OF MAKING CONTAINERS.

Application filed December 23, 19%. Serial 1W0. 77,286.

The invention relates to a method of makingcontainers, and moreparticularly to fibre containers and the method of making and securingthe head to the siding forming the body or coverof such containers.

The object of the invention is to provide a fibre container in which thehead is firmly secured to the siding by a sheet metal band and in whichthe band provides a large bearing and supporting surface for the head soas to provide a very strong construction.

The invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings Fig. 1 is a detail sectional view showing the initialposition of the parts in the forming apparatus before attaching thehead;

Figs. 2 and 3 are views similar to Fig. 1, showing intermediatepositions of the parts in the forming apparatus during the attachment ofthe head;

Fig. 4. is a detail sectional view showing the final position of theparts in the forming apparatus;

Fig. 5 is a perspective view through a section of the containerembodying the invention. l

The subject-matter of the invention relates to the method and meansemployed in connecting the head to the siding of the body or cover ofthe container, and since it is equally applicable for either the coveror body of the container, the container body alone has been shown indetail for the purpose of explaining the invention.

The siding 6 for the container is of fibre tubing, either of pressed ulpor a number of wrappings of paper or fibre sheets, and is generally inthe form of cylindrical or conical tubing.

The head 7 is of fibre, consisting of one or more paper or fibre sheetsor laminations, with one or more of these laminations, as 8, bent at anangle adjacent its edge to form a dished or flanged head having anannular flan e 9.

T e metal sheathing and clamping band 10, preferably of thin sheet steelor other suitable sheet metal, is made up in the form of a band havingan outwardly extending base flange 11 with the main body portion of theband inclining upwardly and outwardly, as shown in Fig. 1, with aslightly curved outer edge 12.

To secure the above-named parts together, the siding is placed over ananvil 13, preferably in the form of an expandible chuck, YIWhICh finallygrips the interior of the sidin and forms a support. for the head. T esiding is clamped between the anvil and an external contractible chuck,14 The dished head, with the flange 9 e xtend1n upwardly, is placedwithin the sldlng, as s own in Fig. 1, and a cylindrical plunger 15 ismoved down so as to clamp the head against the anvil 13. The band 10 isthen placed in position ontop of' said.

head and 'within the flange.

The chuck 14 and the plunger 15 cooperate to form an annular space 16,the sides 17 of the chuck at the lower end of this space being curvedinwardly toward the siding. Concentric annular forming tools 18 and 19work in this space and are moved downwardly in any suitable manner toaccomplish the forming operation. The tool 18 has a curved lower edge 20and it moves down with thetool 19 to the position shown in Fig. 2 tocurl over the edge 12 and move it down over the outer part of thesiding. Thereafter a further movement of the tool 18 presses the curlededge of the band 10 into the sidin and forcesa part 21 of the siding andthe ange of said head adjacent thereto laterally against the head, asshown in Fig. 3, and clamps the flange 9 to the siding, and thereafterthe tool 19 is moved downwardly from the position shown in Fig. 3 to theposition shown in Fig. 4, so as to force the part 22 of said band downinto engagement with the base flange 11 of said band so as to form arelatively wide reinforced flange against which the head abuts to formthe completed closure.

I desire it to be understood that this invention is not to be limited toany specific.

form or manner of constructing the parts except as such limitations arespecified in the fibre container which consists in clamping the sidingof the container and a head in position, inserting the outwardlyextending ase flange of a sheet metal band within the siding, which bandhas a body portion inclining outwardly over that part of the sid ingextending beyond the head, then bendin the outer portion of said bandover the si ing and forcing the extended edge of the siding laterallyover the head, and then bending that portion of the band between thebase and the extended edge of the sldlng against the base flange of saidband.

2. The method of making a reinforced fibre container which consists inclamping the sidin of the container'and a dished hea inserted into anend of the siding in position so that the siding and. the main part ofthe head are held a ainst movement and l5 inserting the outwar 1yextending base flange of a sheet metal band within the siding, whichband has a body portion inclining outwardly over that part of the sidingextending beyond the head, then bending the outer portion of said bandover and into clampin en a ent with the flan of. said hea an t eextended edge of t e siding and forcing said extendedof the sidinglaterally over the head,

ed e and then bending that rtion of the band between the base and t eextended edge of ]the dSiding against the base flange of said Intestimony whereof, I afiix m signature.

EDWIN F. BERT.

